Trying to gauge n52 owners' experience with the oem electric water pump, so let's put up a poll! If you have less than 60,000 miles please do not participate as nobody expects the factory pump to go out before then. If you replaced as part of preventive maintenance, please choose options 1-5, the number of miles logged prior to performing the replacement. Do not choose option 6.

If you did replace your water pump, please also provide the following info:

a. at how many miles?
b. how much did the repair cost (and indicate labor vs parts)?
c. was it replaced at indy or dealer?
d. was there any other damage caused as a result?
e. do you track your vehicle? (DO NOT reply if you participate in canyon carving, street racing, etc.)
f. auto or manual?

oh great now i have to worry about my waterpump going after warranty. I have just shy of 40k miles and warranty done in 2013.

You should get close to double your miles before really having to worry.

Just keep doing preventative maintenance (coolant flush every 30k miles or 2 years) regardless of voltage. Should extend its life. Forgot who it was, but he had 150k on his original water pump / thermostat doing preventative maintenance.

I'm on my third pump. Had mine replaced under warranty with only 5000mi and just had it replaced again at 178,000 mi. I have a hookup at a dealership and it cost me about $600. I do track my car and I believe the second one failed because of multiple dry runs. There is air getting in the cooling lines but only on the track or VERY high loads (full throttle-high rpm for extended stints). The latest pump revision is good and shouldn't fail. Running air through it is about the worst thing you can do to it.

I'm on my third pump. Had mine replaced under warranty with only 5000mi and just had it replaced again at 178,000 mi. I have a hookup at a dealership and it cost me about $600. I do track my car and I believe the second one failed because of multiple dry runs. There is air getting in the cooling lines but only on the track or VERY high loads (full throttle-high rpm for extended stints). The latest pump revision is good and shouldn't fail. Running air through it is about the worst thing you can do to it.

a. at how many miles? 97k miles
b. how much did the repair cost (and indicate labor vs parts)? Parts $660 (pump, thermostat, Pentosin Pentofrost NF and distilled H20) Labor - 0.99
c. was it replaced at indy or dealer? My self
d. was there any other damage caused as a result? no, did did an oil change..
e. do you track your vehicle (canyon carving, street racing, backroads DOES NOT apply)? hits 100 MPH every day!

The night before it failed, I did drive it hard before I went home. When I parked the car and turned it off, the fan was still running at max. It failed on the highway at cruising speeds: orange -> red temp lights in a matter of seconds.

Replaced at about 200000km with a 6mt. Part was under 500 and I changed it myself along with the thermostat while I was there just in case. I drive aggressive and no track. 06 325i and no damage caused.

Full Parts bought from Tisher and installed locally here. 88000km had to replace! No errors yet but the i started getting the symptons and it was annoying as hell so i replaced it before it stopped working. Has been back to normal now